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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '69972a5566bfc33e441e402b1c5c18fae62a0bf80d691a39696a512fdb0bd290' 
  AND token = 'SsNUzGhoS2Uhx7NTUu5a/RAbG+wPklW04sBkWPJC+/U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}